Match Object Properties

Introduction

In this lab, we will explore how to use the matches function in JavaScript to compare two objects and determine if they have equivalent property values. This function can be useful in scenarios where you need to check if two objects have the same properties and values, such as when validating user input or comparing data from different sources. By the end of this lab, you will have a better understanding of how to use the matches function and how it can simplify your coding tasks.

How to Compare Object Properties in JavaScript

To compare two objects and check if they have the same property values, use the matches function. Here's how to use it:

1. Open the Terminal/SSH and type node to start coding.
2. Copy and paste the matches function code into your JavaScript file.
3. Call the function and pass two objects as arguments. The first object is the one you want to compare, and the second object is the one you want to compare it to.

matches({ age: 25, hair: "long", beard: true }, { hair: "long", beard: true });
// true
matches({ hair: "long", beard: true }, { age: 25, hair: "long", beard: true });
// false

The matches function uses Object.keys() to get all the keys of the second object and then checks if all keys exist in the first object and have the same values using Array.prototype.every(), Object.prototype.hasOwnProperty() and strict comparison.

Summary

Congratulations! You have completed the Match Object Properties lab. You can practice more labs in LabEx to improve your skills.